Home / 640,961.42-884,637.75-386,312.90

Finding the Fourth Proportional to 640,961.42, 884,637.75 and 386,312.90

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Solution

The fourth proportional to 640,961.42, 884,637.75 and 386,312.90 is: 533,178.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,961.42 : 884,637.75 = 386,312.90 : x
  2. Step 2: Convert to fraction form
    640,961.42/884,637.75 = 386,312.90/x
  3. Step 3: Cross multiply
    640,961.42x = 884,637.75 × 386,312.90
  4. Step 4: Simplify right side
    640,961.42x = 341,746,974,651.98
  5. Step 5: Solve for x
    x = 341,746,974,651.98/640,961.42
  6. Step 6: Final answer
    x = 533,178.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.